//
//  NSString+Emoji.m
//  DaBaiService
//
//  Created by Liuwenyang on 15/12/11.
//  Copyright © 2015年 Mac-Mini-KingVision. All rights reserved.
//

#import "NSString+Emoji.h"

@implementation NSString (Emoji)

- (BOOL)stringContainsEmoji {
       __block BOOL returnValue = NO;
      [self enumerateSubstringsInRange:NSMakeRange(0, [self length]) options:NSStringEnumerationByComposedCharacterSequences usingBlock:
                  ^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop) {
                
                         const unichar hs = [substring characterAtIndex:0];
                          // surrogate pair
                          if (0xd800 <= hs && hs <= 0xdbff) {
                                  if (substring.length > 1) {
                                          const unichar ls = [substring characterAtIndex:1];
                                          const int uc = ((hs - 0xd800) * 0x400) + (ls - 0xdc00) + 0x10000;
                                          if (0x1d000 <= uc && uc <= 0x1f77f) {
                                                  returnValue = YES;
                                              }
                                      }
                              } else if (substring.length > 1) {
                                      const unichar ls = [substring characterAtIndex:1];
                                      if (ls == 0x20e3) {
                                              returnValue = YES;
                                          }
                        
                                  } else {
                                          // non surrogate
                                         if (0x2100 <= hs && hs <= 0x27ff) {
                                                  returnValue = YES;
                                              } else if (0x2B05 <= hs && hs <= 0x2b07) {
                                                      returnValue = YES;
                                                  } else if (0x2934 <= hs && hs <= 0x2935) {
                                                          returnValue = YES;
                                                      } else if (0x3297 <= hs && hs <= 0x3299) {
                                                              returnValue = YES;
                                                          } else if (hs == 0xa9 || hs == 0xae || hs == 0x303d || hs == 0x3030 || hs == 0x2b55 || hs == 0x2b1c || hs == 0x2b1b || hs == 0x2b50) {
                                                                  returnValue = YES;
                                                              }
                                      }
                      }];
    
         return returnValue;
}

@end
